def render(self, mode='human'):
screen_width = 600
screen_height = 400
world_width = self.max_position - self.min_position
scale = screen_width / world_width
carwidth = 40
carheight = 20
if self.viewer is None:
from scigym.envs.classic_control import rendering
self.viewer = rendering.Viewer(screen_width, screen_height)
xs = np.linspace(self.min_position, self.max_position, 100)
ys = self._height(xs)
xys = list(zip((xs - self.min_position) * scale, ys * scale))
self.track = rendering.make_polyline(xys)
self.track.set_linewidth(4)
self.viewer.add_geom(self.track)
clearance = 10
l, r, t, b = -carwidth / 2, carwidth / 2, carheight, 0
car = rendering.FilledPolygon([(l, b), (l, t), (r, t), (r, b)])
car.add_attr(rendering.Transform(translation=(0, clearance)))
self.cartrans = rendering.Transform()
car.add_attr(self.cartrans)
self.viewer.add_geom(car)
frontwheel = rendering.make_circle(carheight / 2.5)
frontwheel.set_color(.5, .5, .5)
frontwheel.add_attr(
rendering.Transform(translation=(carwidth / 4, clearance)))
frontwheel.add_attr(self.cartrans)
self.viewer.add_geom(frontwheel)
backwheel = rendering.make_circle(carheight / 2.5)
backwheel.add_attr(
rendering.Transform(translation=(-carwidth / 4, clearance)))
backwheel.add_attr(self.cartrans)
backwheel.set_color(.5, .5, .5)
self.viewer.add_geom(backwheel)
flagx = (self.goal_position - self.min_position) * scale
flagy1 = self._height(self.goal_position) * scale
flagy2 = flagy1 + 50
flagpole = rendering.Line((flagx, flagy1), (flagx, flagy2))
self.viewer.add_geom(flagpole)
flag = rendering.FilledPolygon([(flagx, flagy2),
(flagx, flagy2 - 10),
(flagx + 25, flagy2 - 5)])
flag.set_color(.8, .8, 0)
self.viewer.add_geom(flag)
pos = self.state[0]
self.cartrans.set_translation((pos - self.min_position) * scale,
self._height(pos) * scale)
self.cartrans.set_rotation(math.cos(3 * pos))
return self.viewer.render(return_rgb_array=mode == 'rgb_array')
def render(self, mode='human'):
screen_width = 600
screen_height = 400
world_width = self.x_threshold * 2
scale = screen_width / world_width
carty = 100 # TOP OF CART
polewidth = 10.0
polelen = scale * (2 * self.length)
cartwidth = 50.0
cartheight = 30.0
if self.viewer is None:
from scigym.envs.classic_control import rendering
self.viewer = rendering.Viewer(screen_width, screen_height)
l, r, t, b = -cartwidth / 2, cartwidth / 2, cartheight / 2, -cartheight / 2
axleoffset = cartheight / 4.0
cart = rendering.FilledPolygon([(l, b), (l, t), (r, t), (r, b)])
self.carttrans = rendering.Transform()
cart.add_attr(self.carttrans)
self.viewer.add_geom(cart)
l, r, t, b = -polewidth / 2, polewidth / 2, polelen - polewidth / 2, -polewidth / 2
pole = rendering.FilledPolygon([(l, b), (l, t), (r, t), (r, b)])
pole.set_color(.8, .6, .4)
self.poletrans = rendering.Transform(translation=(0, axleoffset))
pole.add_attr(self.poletrans)
pole.add_attr(self.carttrans)
self.viewer.add_geom(pole)
self.axle = rendering.make_circle(polewidth / 2)
self.axle.add_attr(self.poletrans)
self.axle.add_attr(self.carttrans)
self.axle.set_color(.5, .5, .8)
self.viewer.add_geom(self.axle)
self.track = rendering.Line((0, carty), (screen_width, carty))
self.track.set_color(0, 0, 0)
self.viewer.add_geom(self.track)
self._pole_geom = pole
if self.state is None: return None
# Edit the pole polygon vertex
pole = self._pole_geom
l, r, t, b = -polewidth / 2, polewidth / 2, polelen - polewidth / 2, -polewidth / 2
pole.v = [(l, b), (l, t), (r, t), (r, b)]
x = self.state
cartx = x[0] * scale + screen_width / 2.0 # MIDDLE OF CART
self.carttrans.set_translation(cartx, carty)
self.poletrans.set_rotation(-x[2])
return self.viewer.render(return_rgb_array=mode == 'rgb_array')
def add_display(self, posx, rgb):
"""Within render, add a column for displaying some scalar variable."""
from scigym.envs.classic_control import rendering
l, r, t, b = posx - 10, posx + 10, 195, 205
valuebar = rendering.FilledPolygon([(l, b), (l, t), (r, t), (r, b)])
for offset in [0, 50, 100, 150]:
refbar = rendering.Line((l, offset + 200), (r, offset + 200))
refbar.set_color(0.5, 0.5, 0.5)
self.viewer.add_geom(refbar)
valuebar.set_color(rgb[0], rgb[1], rgb[2])
valuebar_trans = rendering.Transform(translation=(0, 0))
valuebar.add_attr(valuebar_trans)
self.viewer.add_geom(valuebar)
return valuebar
def render(self, mode='human'):
"""This raises a NotImplementedError('abstract') error in get_screens.
Solution: downgrade to pyglet 1.2.4
maybe an alternative solution: env.close() at the end of the run file
"""
screen_width = 600
screen_height = 400
scale = screen_width / self.world_width
goal_position = screen_width / 2 + self.x_goal * scale
carty = 200 # TOP OF CART
polewidth = 10.0
polelen = scale * 1.0
cartwidth = 50.0
cartheight = 30.0
if self.viewer is None:
#if the viewer is currently off, initialize a bunch of elements
from scigym.envs.classic_control import rendering
self.viewer = rendering.Viewer(screen_width, screen_height)
l, r, t, b = -cartwidth / 2, cartwidth / 2, cartheight / 2, -cartheight / 2
axleoffset = cartheight / 4.0
cart = rendering.FilledPolygon([(l, b), (l, t), (r, t), (r, b)])
self.carttrans = rendering.Transform()
cart.add_attr(self.carttrans)
self.viewer.add_geom(cart)
l, r, t, b = -polewidth / 2, polewidth / 2, polelen - polewidth / 2, -polewidth / 2
pole = rendering.FilledPolygon([(l, b), (l, t), (r, t), (r, b)])
pole.set_color(.8, .6, .4)
self.poletrans = rendering.Transform(translation=(0, axleoffset))
pole.add_attr(self.poletrans)
pole.add_attr(self.carttrans)
self.viewer.add_geom(pole)
self.axle = rendering.make_circle(polewidth / 2)
self.axle.add_attr(self.poletrans)
self.axle.add_attr(self.carttrans)
self.axle.set_color(.5, .5, .8)
self.viewer.add_geom(self.axle)
self.track = rendering.Line((0, carty), (screen_width, carty))
self.track.set_color(0, 0, 0)
self.viewer.add_geom(self.track)
self.goal = rendering.Line((goal_position, 0),
(goal_position, screen_height))
self.goal.set_color(0, 0, 0)
self.viewer.add_geom(self.goal)
self.energybar = self.add_display(20, (1, 0, 0))
#self.lengthbar = self.add_display(100,(0,0,0))
self.rewardbar = self.add_display(60, (0, 1, 0))
if self.state is None: return None
#now that the viewer is on, apply updated transformations to move elements dynamically
x = self.state
cartx = x[0] * scale + screen_width / 2.0 # MIDDLE OF CART
self.carttrans.set_translation(cartx, carty)
self.poletrans.set_rotation(-x[2])
#move display bars in the y direction to reflect the values of the corresponding functions
self.energybar.attrs[1].set_translation(
0, 30 * self.energy_pole()
) #display kinetic and potential energy of the pole
#self.lengthbar.attrs[1].set_translation(0,10*(self.length-self.min_length)) #display how the agent changes the length of the pole
self.rewardbar.attrs[1].set_translation(0, 100 * self.reward_pos())
return self.viewer.render(return_rgb_array=mode == 'rgb_array')